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【Applied Energy】基于太阳能和氢能互补利用的新型零碳排放系统

AEii国际应用能源  · 公众号  ·  · 2024-02-01 18:30

正文

原文信息:

A novel zero carbon emission system based on the complementary utilization of solar energy and hydrogen

原文链接:

https://www.sciencedirect.com/science/article/pii/S030626192301807X

Highlights

• 开发一种用于生产电力、氢气和储能的新型系统

• 提出太阳能与氢能互补利用的发电技术

•为了减少太阳能波动的影响,提出了三种工作模式

• 与纯氢能模式相比,纯太阳能模式的LCOE降低了75.16%

Research gap

采用太阳能和氢能互补利用技术,取替了常规光热发电系统中的蓄热装置。同时,通过设置三种运行模式,有效缓解了太阳能波动性带来的影响。

摘要

本文提出了一种集发电、制氢、储能于一体的新型零碳排放的电-氢气联产系统。该新型组合系统由塔式太阳能子系统、超临界二氧化碳再压缩布雷顿循环子系统、氢气燃气轮机子系统、制氢子系统和热电发电器子系统组成。考虑到太阳能的不稳定性,为该联合系统设置了三种工作模式:纯氢能模式、太阳能氢能混合模式和纯太阳能模式。对该联合系统进行了全面的能量分析、㶲分析和经济性分析,研究了五个关键参数对系统性能的影响,并以最大的㶲效率和最小的度电成本为目标函数,采用遗传算法对关键参数进行优化。结果表明,在纯氢能模式下,联合系统的热效率和㶲效率分别为44.79%和45.49%。与纯氢能模式相比,太阳能氢能混合模式和纯太阳能模式的度电成本分别降低了44.76%和75.16%。同时,存在一个最优的压缩机压比,使该联合系统具有较好的热力性能和经济性能。参数优化结果表明,在度电成本优化设计案例中,纯太阳能模式下的度电成本分别比纯氢能模式和太阳能氢能混合模式低75.4%和56.3%。此项工作突出了基于太阳能和氢能互补利用的联合系统的巨大潜力。

更多关于“SCO2 Brayton cycle”的研究详见https://www.sciencedirect.com/search?pub=Applied%20Energy&cid=271429&qs=SCO2%20Brayton%20cycle

Abstr act

A novel zero carbon emission combined power and hydrogen system is developed in this paper, which integrates power generation, hydrogen production, and energy storage. The novel combined system is composed of solar power tower subsystem, supercritical carbon dioxide recompression Brayton cycle subsystem, hydrogen gas turbine subsystem, hydrogen production subsystem and thermoelectric generator subsystem. Considering the solar instability, three operating modes are set for the combined system: pure hydrogen mode, solar-hydrogen hybrid mode and pure solar energy mode. Comprehensive energy, exergy and economic analyses are performed for the combined system. The effects of five key parameters on the system performance are investigated. Taking the maximum exergy efficiency and the minimum levelized cost of energy as the objective function, the key parameters are optimized by the genetic algorithm. Results show that in pure hydrogen mode, the thermal and exergy efficiency of the combined system are 44.79% and 45.49%, respectively. Compared with pure hydrogen mode, the levelized cost of energy is reduced by 44.76% and 75.16% in solar-hydrogen hybrid and pure solar energy mode. There is an optimal compressor pressure ratio to make the combined system have better thermodynamic and economic performance. Parameter optimization results show that for pure solar mode, the levelized cost of energy of the combined system is 75.4% and 56.3% lower than that of pure hydrogen mode, solar-hydrogen hybrid mode respectively in the levelized cost of energy optimal design. The derived significant contributions of this work highlight strong potentials for combined system based on solar energy-hydrogen complementary utilization.


Keywords

Solar energy-hydrogen hybrid power generation

Electrolyzer

Hydrogen utilization and storage

Supercritical CO2 recompression Brayton cycle

Parameter optimization

Fig.1 Graphical abstract.

Fig.2 Schematic diagram of the proposed combined system.







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